646459116 has 48 divisors (see below), whose sum is σ = 1630728960. Its totient is φ = 198624960.

The previous prime is 646459111. The next prime is 646459117. The reversal of 646459116 is 611954646.

It is not an unprimeable number, because it can be changed into a prime (646459111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29880 + ... + 46751.

It is an arithmetic number, because the mean of its divisors is an integer number (33973520).

Almost surely, 2^646459116 is an apocalyptic number.

It is an amenable number.

646459116 is an abundant number, since it is smaller than the sum of its proper divisors (984269844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646459116 is a wasteful number, since it uses less digits than its factorization.

646459116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76694 (or 76692 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 646459116 is about 25425.5602888117. The cubic root of 646459116 is about 864.6632906032.

The spelling of 646459116 in words is "six hundred forty-six million, four hundred fifty-nine thousand, one hundred sixteen".